oooooOOOOoooɹɹɹɐɐɐɐ --werewolf greeting in upside down. :-)
Alas, mirrored text (done by using ‮) doesn't seem to work, even if it does show up mirrored when pasted in the comment editbox.
xBFVm6 http://www.qs3pe5zgdxc9iovktapt2dbyppkmkqfz.com/ [qs3pe5zgdx...kmkqfz.com]
A character beyond what UNICODE restricts itself: &#x20FFFF; - shows like
Something below the max limit, valid, but unassigned 𰀁 - shows like
Something that's an invalid UNICODE character -  - shows like
The REPLACEMENT CHARACTER i.e. � - shows like �
Now, what the above will do inside the storage, I don't know, I'm just trying to go forth and BREAK those minions!
(hmmm, the "preview" looks like they are totally kicked out, not replaced by the replacement character [wikipedia.org] - won't cry over the loss of it)